Mechanisms of E Cigarette Vape Induced Epithelial Cell Damage Health experts warn that flavored e cigarettes may lead to permanent lung damage. A U.S. teenager was diagnosed with "popcorn lung" after covertly vaping for three years, resulting in a lifelong, debilitating condition. Fundamentals of vaping associated pulmonary injury leading to severe respiratory distress Life Science Alliance E Cigarette or Vaping Product Use Associated Lung Injury: A Comprehensive Review Even Nicotine Free E Cig Vapor Damages Lung Cells IFLScience